Robertson got engaged to winemaker Flajnik on the season finale of The Bachelor in March, but the couple announced they were breaking up weeks ago.
She has now expressed her belief to Us Weekly that she was treated unfairly while appearing on the ABC reality series.
"In many ways, I felt brainwashed… You're so closed off [from reality]," Robertson explained.
Robertson cited an incident from a filmed date with Flajnik in Switzerland where her beau presented her with her favorite snack popcorn, which had actually been purchased by a Bachelor producer.
She explained that her romance with Flajnik soured after filming ended and the discord ultimately led to their painful split.
"I've never experienced heartache like this… We had baby names picked out," Robertson claimed. "I put up with more than I should."
Robertson is now dating former Bachelorette contestant Arie Luyendyk Jr, a decision which drew a public rebuke from Flajnik this week.